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7.9.3 Host Terminating Read DMA
DMARQ
DMACK-
STOP
HDMARDY-
DSTROBE
DD(15:0)
PARAMETER DESCRIPTION
tRFS
HDMARDY- to final DSTROBE
time
tRP
Ready to pause time
tLI
Limited interlock time
Maximum time allowed for
tAZ
output drivers to release
tZAH
Minimum delay time required for
output
tMLI
Interlock time with minimum
tDS
CRC word setup time at device
tDH
CRC word hold time at device
tACK
Hold time for DMACK-
tIORDYZ
Maximum time before releasing
IORDY
Figure 42. Ultra DMA cycle timings (Host Terminating Read)
tRP
tRFS
xxxxxxxxxxxxxxxxxx
xxx
RD Data
Device drives DD
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
tLI
tLI
tIORDYZ
tAZ
tZAH
MODE 0
MODE 1
MODE 2
MIN
MAX
MIN
MAX
MIN
(ns)
(ns)
(ns)
(ns)
(ns)
–
75
–
70
–
160
–
125
–
100
0
150
0
150
0
–
10
–
10
–
20
–
20
–
20
20
–
20
–
20
15
–
10
–
7
5
–
5
–
5
20
–
20
–
20
–
20
–
20
–
52
tMLI
tACK
tACK
tDH
tDS
xxx
CRC
xxxxxxxxxxx
Host drives DD
MODE 3
MODE 4
MAX
MIN
MAX
MIN
MAX
(ns)
(ns)
(ns)
(ns)
(ns)
60
–
60
–
60
–
100
–
100
–
150
0
100
0
100
10
–
10
–
10
–
20
–
20
–
–
20
–
20
–
–
7
–
5
–
–
5
–
5
–
–
20
–
20
–
20
–
20
–
20
MODE 5
MIN
MAX
(ns)
(ns)
–
50
85
–
0
75
–
10
20
–
20
–
4
–
4.6
–
20
–
–
20
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